resource specialized to present tense ; preprocessor flag

src/GF/Compile/Compile.hs

@@ -84,7 +84,7 @@ compileModule opts st0 file |
   grammar1 <- case suff of
     "cf"   -> putp ("- parsing" +++ suff +++ file) $ getCFGrammar opts file
     "ebnf" -> putp ("- parsing" +++ suff +++ file) $ getEBNFGrammar opts file
-    "gfm"  -> putp ("- parsing" +++ suff +++ file) $ getSourceGrammar file
+    "gfm"  -> putp ("- parsing" +++ suff +++ file) $ getSourceGrammar opts file
     _      -> putp ("- parsing old gf" +++ file)   $ getOldGrammar opts file
   let mods = modules grammar1
   let env = compileEnvShSt st0 []
@@ -195,7 +195,7 @@ compileOne opts env@((_,srcgr,_),_) file = do
 
     -- for compiled resource, parse and organize, then update environment
     "gfr" -> do
-       sm0 <- putp ("| reading" +++ file) $ getSourceModule file
+       sm0 <- putp ("| reading" +++ file) $ getSourceModule opts file
        sm <- {- putp "creating indirections" $ -} ioeErr $ extendModule mos sm0
 ---- experiment with not optimizing gfr 
 ----      sm:_  <- putp "  optimizing " $ ioeErr $ evalModule mos sm1
@@ -206,7 +206,8 @@ compileOne opts env@((_,srcgr,_),_) file = do
 
     -- for gf source, do full compilation
     _ -> do
-       sm0 <- putpOpt ("- parsing" +++ file) ("- compiling" +++ file ++ "... ") $ getSourceModule file
+       sm0 <- putpOpt ("- parsing" +++ file) ("- compiling" +++ file ++ "... ") $ 
+                                           getSourceModule opts file
        (k',sm)  <- makeSourceModule opts (fst env) sm0
        cm  <- putpp "  generating code... " $ generateModuleCode opts path sm
        ft <- getReadTimes file

src/GF/Compile/GetGrammar.hs

@@ -44,16 +44,25 @@ import GF.Infra.ReadFiles ----
 import Data.Char (toUpper)
 import Data.List (nub)
 import Control.Monad (foldM)
+import System (system)
 
-getSourceModule :: FilePath -> IOE SourceModule
-getSourceModule file = do
+getSourceModule :: Options -> FilePath -> IOE SourceModule
+getSourceModule opts file0 = do
+  file <- case getOptVal opts usePreprocessor of
+    Just p -> do
+      let tmp = "_gf_preproc.tmp"
+          cmd = p +++ file0 ++ ">" ++ tmp
+      ioeIO $ system cmd
+      -- ioeIO $ putStrLn $ "preproc" +++ cmd
+      return tmp
+    _ -> return file0
   string    <- readFileIOE file
   let tokens = myLexer string
   mo1  <- ioeErr $ {- err2err $ -} pModDef tokens
   ioeErr $ transModDef mo1
 
-getSourceGrammar :: FilePath -> IOE SourceGrammar
-getSourceGrammar file = do
+getSourceGrammar :: Options -> FilePath -> IOE SourceGrammar
+getSourceGrammar opts file = do
   string    <- readFileIOE file
   let tokens = myLexer string
   gr1  <- ioeErr $ {- err2err $ -} pGrammar tokens

src/GF/Infra/Option.hs

@@ -313,6 +313,7 @@ pathList       = aOpt "path"
 uniCoding      = aOpt "coding"
 probFile       = aOpt "probs"
 noparseFile    = aOpt "noparse"
+usePreprocessor = aOpt "preproc"
 
 -- peb 16/3-05:
 gfcConversion :: String -> Option

src/GF/Shell/HelpFile.hs

@@ -74,6 +74,7 @@ txtHelpFile =
   "\n      -optimize     select an optimization to override file-defined flags" ++
   "\n      -conversion   select parsing method (values strict|nondet)" ++
   "\n      -probs        read probabilities from file (format (--# prob) Fun Double)" ++
+  "\n      -preproc      use a preprocessor on each source file" ++
   "\n      -noparse      read nonparsable functions from file (format --# noparse Funs) " ++
   "\n  examples:" ++
   "\n      i English.gf                      -- ordinary import of Concrete" ++

src/GF/Shell/ShellCommands.hs

@@ -170,7 +170,7 @@ optionsOfCommand co = case co of
 	           "cat lang lexer parser number depth rawtrees unlexer optimize path conversion printer"
 
   CImport _ -> both "old v s src gfc retain nocf nocheckcirc cflexer noemit o ex prob"
-                    "abs cnc res path optimize conversion cat probs noparse"
+                    "abs cnc res path optimize conversion cat preproc probs noparse"
   CRemoveLanguage _ -> none
   CEmptyState -> none
   CStripState -> none

src/HelpFile

@@ -45,6 +45,7 @@ i,  import: i File
       -optimize     select an optimization to override file-defined flags
       -conversion   select parsing method (values strict|nondet)
       -probs        read probabilities from file (format (--# prob) Fun Double)
+      -preproc      use a preprocessor on each source file
       -noparse      read nonparsable functions from file (format --# noparse Funs) 
   examples:
       i English.gf                      -- ordinary import of Concrete